An assertion Wednesday by a white Republican gubernatorial candidate that Florida voters cannot afford to “monkey this up” and vote for his black Democratic opponent, Andrew Gillum, was widely viewed as a “dog whistle” to rally racists.

If it was a dog-whistle – the GOP candidate denies any racial intent – a jungle music-scored robocall that has circulated in Florida is more akin to a loudhailer.

If nothing else, the minute-long audio clip is a clear sign of how quickly racism – subtle in some cases, overt in others – has seeped into the contest to determine who will lead Florida.

“Well hello there,” the call begins as the sounds of drums and monkeys can be heard in the background, according to The New York Times. “I is Andrew Gillum.”

“We Negroes … done made mud huts while white folk waste a bunch of time making their home out of wood an stone.”

The speaker goes on to say he will pass a law letting African-Americans evade arrest “if the Negro know fo’ sho he didn’t do nothin.’” It is unclear how many people heard the call.

In a statement emailed to The Washington Post, McGillum’s spokesman, Geoff Burgan said: “This is reprehensible – and could only have come from someone with intentions to fuel hatred and seek publicity. Please don’t give it undeserved attention.”

People on the other side of the aisle also spoke out cagainst the telephone campaign, which was first reported by the Tallahassee Democrat.

In a tweet, Florida Governor Rick Scott, who is a Republican candidate for the US Senate, blasted whoever was behind the robocall.

“There is no room for any racial politics here in Florida – none,” the tweet said. “Florida is a melting pot of people from all over the globe, and we are proud of it. No attempts to divide people by race or ethnicity will be tolerated, from anyone. THIS. STOPS. NOW.”

There is no room for any racial politics here in Florida - none. Florida is a melting pot of people from all over the globe, and we are proud of it. No attempts to divide people by race or ethnicity will be tolerated, from anyone. THIS. STOPS. NOW. https://t.co/LX72MvP89P

And a spokesman for Representative Ron DeSantis – the GOP gubernatorial candidate criticised for making racially-tinged comments about Gillum – called the robocalls “disgusting.”

“This is absolutely appalling and disgusting – and hopefully whoever is behind this has to answer for this despicable action,” Stephen Lawson, a spokesman for the DeSantis campaign, said, according to the Tampa Bay Times. “Our campaign has and will continue to focus solely on the issues that Floridians care about and uniting our state as we continue to build on our success.”

DeSantis has said his comments were aimed go Gillum’s policies, not his skin colour.

“I have been really slow to try to think on it because it’s too big,” he told Associated Press. “There will absolutely be a part of this that I can’t even put words to around what it might mean for my children and other people’s kids. Especially growing up for them in the age of Donald Trump.”

A disclaimer at the end of the robocall says it was produced by The Road to Power, a white supremacist and anti-Semitic group based in Idaho. The Southern Poverty Law Centre has noted a recent rise in robocalls across the country, calling them a “new, hi-tech, computer-delivered brand of hate,” according to The Times.

The Road to Power is also the group behind the most unsubtle attempt to turn the killing of Mollie Tibbetts in Iowa into anti-immigration policy and a 2018 campaign talking point.

Tibbetts, a 20-year-old University of Iowa student, disappeared in July while on a jog around her hometown. Authorities found her body in a cornfield a month later, led by a man they said confessed to chasing Tibbetts after seeing her running, then dragging her body into a field just outside the town of Brooklyn, Iowa.

The suspect, Cristhian Rivera, is a dairy farmworker who is an undocumented immigrant, and conservatives said Tibbetts’ death highlights the need for stronger immigration laws and even a border wall.